Pipe-coupling.



No. 650,330. Patented May 22, I900. J. c. KUBTZ.

PIPE COUPLING.

(Application filed se' c. 27, 1899.)

(No Model.)

wz uumus wzrzns co. P'Ha'mLlmQ. WASHINGTON. n. c.

NITED STATES PATENT Fries.

JoIiNo. KURTZ, or DAYTON, onto.

PIPE-COUPLING.

SPECIFICATION forming part of Letters Patent No. 650,330, dated May 22, 1900. Applioationfiled September 27,1899. Serial No. 731,863. (No model.)

' erence being had to the accompanying drawings, and to the figures of reference marked thereon, which form a partof this specification.

This invention relates to improvements in pipe joints or couplings.

Owing to the general prevalence of electrolysis or the destruction of underground piping by high=voltage currents of electricity the protection and repair of such piping has become one of the problems of modern civili-' zation. This evil manifests itself at different points of the-pipin g, and it becomes necessary 7 to remove parts affected-and to replace them with joints or couplings. Such couplings it is essential should bothinsulate the connection of the pipe and make it fluid-tight.

It is therefore the object of this invention to provide a coupling of this kind, the particular features of which will be fully described, reference being first made to the accompanying drawings, of which- Figure 1 is a sectional elevation of one end of the coupling, showing the character of the joint Fig. 2, an elevation of the coupling complete; Fig. 3, an elevation of the rubber packing-sleeve; Fig. 4, an elevation of one of the end flanges; Fig. 5, an elevation showing a modification of the coupling-sleeve in the form of a T-fitting; Fig. 6, a diagrammatical view showing the lines of force when the elastic packing-sleeve is compressed.

The elastic packing-sleeve,which surrounds the end of the pipe 1 and by means of which the metallic parts of the coupling are insulated from the pipe and a fluid-tight joint is obtained, comprises a central annular flange or ring 2, which before compression is squareshouldered, as shown in Fig. 3. From this ring portion 2 are extensions or sleeve-like portions 3 and 4, which taper from said ring to the ends on the outer surface, thus providing a thicker portion at the part adjacent to the said ring. This is an important feature of the construction of the packing-sleeve for the reasons hereinafter specified.

5 designates the end flanges, which are recessed to provide a tapering seat 6 to receive the ring 2 of the elastic sleeve. The said ,fianges are also provided with laterally-ex tended rims-7, which fit over the end of the coupling-sleeve 8, the ends of said coupling,

sleeve being also beveled to provide a surface 9, similar to the seat 6, between which parts the ring 2 is compressed. When in position, as shown in' Fig. 1, the sleeve portion 3 of the packing projects out around the pipe 1 and beyond the flange 5,so that the said flange at each end is insulated from the pipe. The inner sleeve portion 4 of said packing in a similar manner projects inwardly around the inclosed end of the piping and insulates the coupling-sleeve 8 therefrom. The-end flanges 5 are secured by bolts 10 on opposite sides, which are tightened to compress the packingsleeve. In the coupling shown only two such bolts are necessary. Projecting from opposite sides of said end flanges and being integral parts thereof are ears 11. When in position, these cars lie close to the couplingsleeve 8 and serve the functions of additional bolts to the extent that they prevent any giving of the coupling in the direct-ion of said cars.

In place of the coupling-sleeve 8 (shown in Figs. 1 and 2) a T-fitting is used wherever a branch connection is made. v

As shown in the-diagram Fig. 6, when compression is placed upon the ring 2 of the elastic packing by tightening the bolts the sleeve portions 3 and 4 thereof are extended around the pipe and are made to adhere closely to said pipe. Thus the said packing-sleeve forms a complete insulation between the metallic parts of the coupling and the pipe. This extension of the ends of the packing sleeve is due to its being beveled on its outer surface from center to ends, as hereinbefore specified. The inclined dotted lines in the diagram Fig. 6 indicate the directions of the lines of force, which extend to the ends of the pack ing sleeve. The fluid-tight feature of the coupling is obtained by the inward pressure on the packing-sleeve at the ring portion 2,

which is indicated by t dotted lines.

Having described my invention, I claim 1. In a coupling for uniting and insulating the ends of pipe-sections, the combination with a coupling-sleeve receivingthe ends of the pipe-sections, and end flanges provided with annular seats, and laterally-extended annular rims which overlap the ends of thecoupling-sleeve, of an insulating-sleeve having a central enlargement or ring 2 around its outer surface from'which are extendedsleeve portions 3 and 4, the ring or enlargement 2 being inclosed between the end of the coupling-sleeve and an end flange, and the sleeve portions 3 and 4 inclosing an end ofa pipe, as herein shown and described.

2. In a coupling for uniting and insulating the ends of pipe-sections, the combination of a coupling-sleeve, and end flanges having annular seats in one side thereof, and laterallyprojecting rims which overlap the ends of the coupling-sleeve, elastic packing-sleeves inclosing the ends of the pipe-sections and projecting beyond the outer sides of the end flanges, the said elastic sleeves having outer peripheral rings that are inclosed between the seats in the end flanges and the ends of the coupling-sleeve and which receive the pres- 30 sure due to the tightening of said end flanges he parallel or vertical and the coupling-sleeve, substantially as de scribed.

3. In a pipe-coupling, the combination with a couplipg-sleeve and an end flange having a beveled seat with laterally-extended rim which incloses the end of the coupling-sleeve, and ears extending from said rim on each side, of a packing-sleeve having an outer peripheral ring inclosed between said seat and the end of the coupling-sleeve, the said packing- 4o -r'rng inclosing the end of the pipe that projects into the coupling-sleeve, and projecting beyond the end flange on the opposite side so thatth'e end of the pipe is insulated from the coupling-sleeve and said flange, substantially as described.

4. In a pipe-coupling, the combination with a coupling-sleeve, of end flanges with in wardly-extended annular rims which overlap the ends of said sleeve and ears extending from said rims at opposite points of said flanges, and means for tightening said flanges on the ends of the coupling-sleeve, substantially as described.

, In testimony whereof I affix my signature in presence of two witnesses.

JOHN C. KURTZ. Vitnesses:

R. J. McCARrY, CARL H. Non. 

